<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="提交审核"/>
    </el-steps>

    <el-button type="text" @click="openChapterDialog()" ref="openChapterDialogref">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button type="text" @click="openVideo(chapter.id)">添加课时</el-button>
                    <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}
                        <span class="acts">
                            <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                            <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                        </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

     <!-- 添加和修改课时表单 -->
     <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="0">免费</el-radio>
            <el-radio :label="1">默认</el-radio>
          </el-radio-group>
        </el-form-item>

        <!--上传视频-->
        <el-form-item label="上传视频">
          <el-upload
           :on-success="handleVodUploadSuccess"
           :on-remove="handleVodRemove"
           :before-remove="beforeVodRemove"
           :on-exceed="handleUploadExceed"
           :file-list="fileList"
           :action="BASE_API+'/eduvod/video/uploadAliyunVideo'"
           :limit="1"
           class="upload-demo">
          <el-button size="small" type="primary">上传视频</el-button>
          <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                  支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                  GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                  MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                  SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
              <i class="el-icon-question"/>
          </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default {
  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      saveVideoBtnDisabled: false,
      chapterVideoList:[],
      courseId:'',
      dialogChapterFormVisible: false,
      dialogVideoFormVisible: false,
      chapter: {
        title: '',
        sort: 0
      },
      video: {
          title: '',
          sort: 0,
          isFree: 0,
          videoSourceId: '',
          videoOriginalName: ''
      },
      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API // 接口API地址
    }
  },

  created() {
    if (this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            this.getChapterVideo()
      }
  },
  methods: {
    //点击确认调用的方法
    handleVodRemove(){
        video.deleteAlyVod(this.video.videoSourceId)
        .then(response => {
              this.$message({
                  type: 'success',
                  message: '删除成功!'
              })
              this.fileList = [];
              this.video.videoSourceId= ''
              this.video.videoOriginalName= ''
        })
    },
    //点击X调用的方法
    beforeVodRemove(file,fileList){
      return this.$confirm(`确认移除${file.name}?`)

    },
    handleVodUploadSuccess(response,file,fileList){
      this.video.videoSourceId = response.data.videoId

      this.video.videoOriginalName = file.name
    },
    //视图上传多于一个视频
    handleUploadExceed(files, fileList) {
      this.$message.warning('想要重新上传视频，请先删除已上传的视频')
    },
    //==============================小节部分====================================
    removeVideo(videoId){
      this.$confirm('此操作将永久删除该小节, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
          }).then(() => {
            return video.deleteVideo(videoId)
          }).then(() => {
              this.getChapterVideo() 
              this.$message({
                  type: 'success',
                  message: '删除成功!'
              })
          })
    },
    openEditVideo(videoId){
      this.dialogVideoFormVisible=true
        video.getVideo(videoId)
        .then(response => {
        this.video = response.data.video
      })
    },
    openVideo(chapterId){
        this.dialogVideoFormVisible = true

        this.video.title=''
        this.video.sort=0
        this.video.isFree=0
        this.video.videoSourceId=''
        this.fileList=[]
        this.video.chapterId = chapterId
        this.video.courseId = this.courseId
    },
    addVideo(){
      video.addVideo(this.video)
      .then(response =>{
        this.dialogVideoFormVisible=false
          this.$message({
                type: 'success',
                message: '增加小节信息成功'
            })
           this.getChapterVideo()
      })
    },
    updateVideo() {
        video.updateVideo(this.video)
        .then(response => {
          this.dialogVideoFormVisible=false
          this.$message({
                type: 'success',
                message: '修改小节信息成功'
            })
            this.video.title=''
            this.video.sort=0
            this.video.isFree=0
            this.video.videoSourceId=''
           this.getChapterVideo() 
        })
    },
    saveOrUpdateVideo(){
      if(!this.video.id)
        this.addVideo()
        else this.updateVideo()
    },
    //===========================章节部分===================================
    openEditChapter(chapterId){
      this.dialogChapterFormVisible=true
      chapter.getChapter(chapterId)
      .then(response => {
        this.chapter = response.data.chapter
      })
    },
    openChapterDialog(){
         this.dialogChapterFormVisible=true
          this.chapter.title=''
          this.chapter.sort=0
    },
    removeChapter(id){
      this.$confirm('此操作将永久删除该章节, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
          }).then(() => {
              return chapter.deleteChapter(id)
          }).then(() => {
              this.getChapterVideo() 
              this.$message({
                  type: 'success',
                  message: '删除成功!'
              })
          })
    },
    addChapter(){
        this.chapter.courseId = this.courseId
        chapter.addChapter(this.chapter)
        .then(response => {
          this.dialogChapterFormVisible=false
          this.$message({
                type: 'success',
                message: '增加章节信息成功'
            })
           this.getChapterVideo()
        })
    },
    updateChapter() {
        chapter.updateChapter(this.chapter)
        .then(response => {
          this.dialogChapterFormVisible=false
          this.$message({
                type: 'success',
                message: '修改章节信息成功'
            })
            this.chapter.id=''
           this.chapter.title=''
           this.chapter.sort=0
           this.getChapterVideo() 
        })
    },
    saveOrUpdate(){
       if(!this.chapter.id) {
        this.addChapter()
        }
       else {
        this.updateChapter()
        }
    },
    getChapterVideo() {
       chapter.getAllChapterVideo(this.courseId)
      .then(response =>{
        this.chapterVideoList = response.data.allChapterVideo
      })
    }
    ,
    previous() {
      this.$router.push({ path: '/course/info/'+this.courseId })
    },

    next() {
      this.$router.push({ path: '/course/publish/'+this.courseId})
    }
  }
}
</script>

<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>